class ActiveSupport::Deprecation::DeprecatedConstantProxy
DeprecatedConstantProxy
transforms a constant into a deprecated one. It takes the names of an old
(deprecated) constant and of a new constant (both in string form) and
optionally a deprecator. The deprecator defaults to
ActiveSupport::Deprecator
if none is specified. The deprecated
constant now returns the value of the new one.
PLANETS = %w(mercury venus earth mars jupiter saturn uranus neptune pluto) (In a later update, the original implementation of `PLANETS` has been removed.) PLANETS_POST_2006 = %w(mercury venus earth mars jupiter saturn uranus neptune) PLANETS = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('PLANETS', 'PLANETS_POST_2006') PLANETS.map { |planet| planet.capitalize } # => DEPRECATION WARNING: PLANETS is deprecated! Use PLANETS_POST_2006 instead. (Backtrace information…) ["Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"]
Public Class Methods
new(old_const, new_const, deprecator = ActiveSupport::Deprecation.instance)
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# File lib/active_support/deprecation/proxy_wrappers.rb, line 124 def initialize(old_const, new_const, deprecator = ActiveSupport::Deprecation.instance) @old_const = old_const @new_const = new_const @deprecator = deprecator end
Public Instance Methods
class()
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Returns the class of the new constant.
PLANETS_POST_2006 = %w(mercury venus earth mars jupiter saturn uranus neptune) PLANETS = ActiveSupport::Deprecation::DeprecatedConstantProxy.new('PLANETS', 'PLANETS_POST_2006') PLANETS.class # => Array
# File lib/active_support/deprecation/proxy_wrappers.rb, line 135 def class target.class end
Private Instance Methods
target()
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# File lib/active_support/deprecation/proxy_wrappers.rb, line 140 def target ActiveSupport::Inflector.constantize(@new_const.to_s) end
warn(callstack, called, args)
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# File lib/active_support/deprecation/proxy_wrappers.rb, line 144 def warn(callstack, called, args) @deprecator.warn("#{@old_const} is deprecated! Use #{@new_const} instead.", callstack) end